--- a/cubicweb/schema.py	Tue Dec 22 09:23:00 2015 +0100
+++ b/cubicweb/schema.py	Tue Feb 23 12:18:47 2016 +0100
@@ -1140,12 +1140,6 @@
 
 # additional cw specific constraints ###########################################
 
-# these are implemented as CHECK constraints in sql, don't do the work
-# twice
-StaticVocabularyConstraint.check = lambda *args: True
-IntervalBoundConstraint.check = lambda *args: True
-BoundaryConstraint.check = lambda *args: True
-
 class BaseRQLConstraint(RRQLExpression, BaseConstraint):
     """base class for rql constraints"""
     distinct_query = None